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[Monitoring the decontamination degree of the slurry using the alternative aerobic and anaerobic fermentations]
2001
Tibru, I. | Nichita, I. | Savescu, E. | Mircov, V.D. (Facultatea de Medicina Veterinara, Timisoara (Romania))
This paper presents the results obtained after an alternative treatment (aerobic and anaerobic) of the animal slurry. We discussed only about the problems related to the effects of denitrification and dephosphatation on coliform bacteria. We noticed a good decontamination of the slurry using alternatively the two procedures. To determine the decontamination degree we used the classical multiple tubes method. The same samples were examined through the field microbiological test (FMT) adding Kovacs reagent. There is a concordance between the coliform bacteria determined through the classical method and the number determined through FMT to which the Kovacs reagent adding increases the sensitivity degree.
显示更多 [+] 显示较少 [-][Lake Prespa [The former Yugoslav Republic of Macedonia]: comparative investigations of watershed and lake water]
2001
Jordanoski, M. | Veljanoska-Sarafiloska, E. (Hidrobioloski zavod, Ohrid (The Former Yugoslav Republic of Macedonia))
Criteria for obtaining quality indicators of surface waters: an example of the South Morava river basin [Serbia, Yugoslavia]
2001
Veljkovic, N. (Vodovod, Leskovac (Yugoslavia)) | Milenkovic, S. | Dopudja-Glisic, T.
The work gives the regime of surface water flows with hydrographic net and the regime of waters at hydrologic stations for the period of 1988-1998. Consequently in this paper will be designed a resonant indicator which is derived out of the composite index group of WQI for the flow field in the period under research. Depending on the index points won at the examined profiles, estimation of waterflows quality will be adapted to the goals of indicator users, in this case to the public. Indicators of the type very poor, poor, good, very good and excellent. Hereto it is important to mention that hereby validity of original composite indicator will have to be sacrificed.
显示更多 [+] 显示较少 [-]Survey of aquatic macrophytes and estimate of water quality of the lake Provala [Serbia, Yugoslavia]
2001
Stojanovic, S. | Popovic, M. | Nikolic, Lj. | Malencic, Dj. (Poljoprivredni fakultet, Novi Sad (Yugoslavia))
The lake Provala near Vajska (Serbia, Yugoslavia) was created by the embankment performation during high Danube river levels in 1924. It is a very important water ecosystem of natural origin, which is a fact of great importance for exact biological and ecological research. Miljanovic (1996) and Pujin (1997) present the first lake Provala water state data. They emphasise the reinforced eutrophication process in the shore region. This paper presents the review of the macrophytes vegetation of the lake Provala recent state for the first time, with special attention to dominant plant species. Based on the present taxons analysis, as well as water chemical parameters analysed (NH4(+), NO3(-), NO2(-), PO4(3-), HPK, BPK, pH), it can be concluded that the eutrophication process is present in this water micro-reservoir. It is especially true for the shore region and shallow waters, where the process is already well under way and very fast. These research results can be used to efficiently protect this natural water ecosystem.
显示更多 [+] 显示较少 [-]Sapromicrobiological aspect of the water and mud quality of the most polluted sector (Bezdan-Bechey) of the main canal of the DTD [Danube - Tisza - Danube] canal net [Serbia, Yugoslavia]
2001
Gajin, S. (Prirodno-matematicki fakultet, Novi Sad (Yugoslavia). Institut za biologiju) | Matavulj, M. | Petrovic, O. | Radnovic, D. | Simeunovic, J.
As a result of this study the overload by pollutants and low quality of canal water in the zone downstream of Vrbas and Srbobran towns (Serbia, Yugoslavia) has been recorded. Regarding to started work on demudification of canal bottom in the industrial zone of Vrbas town, in the course of 2000 the additional investigations of mud profile downstrean of wastewater discharge into the canal have been done. In the investigated mud samples the extremely high number of organotrophic bacteria was found (up to 1.7 x 10**10 cfu/ml), but also high number of conditionally pathogenic bacteria (opportunistic bacteria) was recorded. Also, the high number of fecal (thermo-tolerant) coliform bacteria (Escherichia coli and Klebsiella - Enterobacter - Citrobacter group of bacteria), as well as the presence of colifags was found. Such findings indicate possible bad consequences to the health of humans contacting this mud, as well as to the ground water quality, indirectly, via drainage water.
显示更多 [+] 显示较少 [-][Quality of the Danube sediment at the locality of the water source "Ratno Ostrvo" near [the town] Novi Sad [Serbia, Yugoslavia]]
2001
Djurendic, M. | Dalmacija, B. | Agbaba, J. | Roncevic, S. | Becelic, M. | Borisev, V. | Brenesel, D. | Rajacic, M. (Prirodno-matematicki fakultet, Novi Sad (Yugoslavia). Institut za hemiju)
Aim of this study was to assess quality of the Danube sediment from the water source "Ratno Ostrvo", which is in the vinicity of the Oil Refinery "Novi Sad" (Serbia, Yugoslavia), after bombardment of the refinery in 1999. In the period March-October 2000, sediment samples were analysed for their oil and oil-derivates contents, i.e. mineral oils contents, by quantitative IR-spectrophotometry, and by qualitative and quantitative GC/MS analyses for their polycyclic aromatic hydrocarbons (PAH) contents. Oil pollution was detected in sediment samples.
显示更多 [+] 显示较少 [-]On minimum flows allowed for withdrawal from surface water network
2001
Vukmirovic, V. | Petrovic, J. | Pavlovic, D. (Univerzitet u Beogradu, Beograd (Yugoslavia). Gradjevinski fakultet)
Withdrawal of water from surface water network should be concerned with preservation of the environment, meaning that the low flow regime in streams should be preserved within the range of natural regime. In order to formulate criteria for minimal allowed flows in streams, it was necessary to perform statistical analysis of low flows in rivers in Serbia (Yugoslavia). The criteria for water withdrawal are proposed on the basis of characteristic ratios between minimum and mean flows. Different criteria are proposed for cold and warm seasons.
显示更多 [+] 显示较少 [-]Dynamics and relationships of some physiological bacterial groups in Grosnica reservoir [Serbia, Yugoslavia]
2001
Milosevic, S. (HK Gosa, Smederevska Palanka (Yugoslavia). Gosa institut)
Microbiological examination have been carried within the comprehensive hydrobiological investigation of Grosnica reservoir (Serbia, Yugoslavia) during 1997 and 1998. The aim of investigation was to establish the dynamics and fluctuation of specific physiological group. Grosnica reservoir with its microbial features belongs to quality class 1st-2nd according to Kohl. The comparison of bacteria community varies during the year depending of physicochemical features of a environment and the state of other facts in biocenosis. Dominant bacteria are facultative oligotrophic. The larger number of heterotrophic bacteria is in spring time only. Phosphomineralizers and proteolytic bacteria are present in the large number at the beginning of year, amylolytic bacteria are numerable during the summer and autumn. Number of nitrogen fixing bacteria and aerobic cellulolytic bacteria are changed depending on a season, too.
显示更多 [+] 显示较少 [-]Contribution to the knowledge of qualitative composition of macrozoobenthos and quality of water of the Crvena Reka river [Serbia, Yugoslavia]
2001
Zivic, I. (Bioloski fakultet, Beograd (Yugoslavia). Institut za zoologiju) | Markovic, Z. | Brajkovic, M.
The investigations of the macrozoobenthos of the Crvena Reka river (Serbia, Yugoslavia), left tributary to the Nisava river, were performed during July in 1999. Samples were collected from 15 localities, from the spring of the Crvena Reka river (originating from Toponicka and Vetska rivers) to the lower course, the aim being to investigate the diversity of macrozoobenthos of these running waters which had not been investigated. The community of macroinvertebrates of the Crvena Reka river and the streams, which make it, consists of 54 determined taxa (at species and genus level) from 16 animal groups. Larvae of Ephemeroptera and Trichoptera have the greatest diversity, each having ten determined taxa. The middle course of the Topnicka river (locality T4) is characterized by the greatest diversity (25 taxa), while the springs (due to constant ecological parameters) have poor diversity with two and one determined taxa in locality V1 and V2, respectively. The water quality of the investigated river and streams, which make it, on the basis of the results of saprobiological analysis, is of beta-mezosaprobic quality, i.e. second class of quality in most localities.
显示更多 [+] 显示较少 [-]Water resources protection in Serbia [Yugoslavia] from the aspect of erosion hazard
2001
Ristic, R. (Sumarski fakultet, Beograd (Yugoslavia)) | Djekovic, V. | Marinkovic, P.
Spacial Plan of Serbia (Yugoslavia) predicts the concept of water supply, which is based on exploitation of water from surface storages, formed or under construction. Usage of surface storages is profitable if exploitation of water takes place by protected capacity, during predicted period. Useful spaces of storages are endangered by fulfillment with erosional material, especially in hilly-mountainous region. By the way, particles of sediment are the carriers of pollutants from agricultural surfaces and products of wet and dry deposition from the atmosphere. In order to protect storages by fulfillment, primary tasks are decreasing the erosion production and stopping the existing quantities of sediment in the hydrographic system. Data about investments in erosion control works (period 1994-2000) are presented in the paper. It is necessary to increase level of investments, because the territory of Serbia (Yugoslavia) is region of high risk, in the sense of erosional material production.
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